1 /*
2 * Copyright (c) 2012 Stefano Sabatini
3 *
4 * This file is part of FFmpeg.
5 *
6 * FFmpeg is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU Lesser General Public
8 * License as published by the Free Software Foundation; either
9 * version 2.1 of the License, or (at your option) any later version.
10 *
11 * FFmpeg is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
14 * Lesser General Public License for more details.
15 *
16 * You should have received a copy of the GNU Lesser General Public
17 * License along with FFmpeg; if not, write to the Free Software
18 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
19 */
20
21 /**
22 * @file
23 * audio to video multimedia filter
24 */
25
26 #include "libavutil/avassert.h"
27 #include "libavutil/avstring.h"
28 #include "libavutil/channel_layout.h"
29 #include "libavutil/opt.h"
30 #include "libavutil/parseutils.h"
31 #include "avfilter.h"
32 #include "filters.h"
33 #include "formats.h"
34 #include "audio.h"
35 #include "video.h"
36 #include "internal.h"
37
38 enum ShowWavesMode {
39 MODE_POINT,
40 MODE_LINE,
41 MODE_P2P,
42 MODE_CENTERED_LINE,
43 MODE_NB,
44 };
45
46 enum ShowWavesScale {
47 SCALE_LIN,
48 SCALE_LOG,
49 SCALE_SQRT,
50 SCALE_CBRT,
51 SCALE_NB,
52 };
53
54 enum ShowWavesDrawMode {
55 DRAW_SCALE,
56 DRAW_FULL,
57 DRAW_NB,
58 };
59
60 enum ShowWavesFilterMode {
61 FILTER_AVERAGE,
62 FILTER_PEAK,
63 FILTER_NB,
64 };
65
66 struct frame_node {
67 AVFrame *frame;
68 struct frame_node *next;
69 };
70
71 typedef struct ShowWavesContext {
72 const AVClass *class;
73 int w, h;
74 AVRational rate;
75 char *colors;
76 int buf_idx;
77 int16_t *buf_idy; /* y coordinate of previous sample for each channel */
78 AVFrame *outpicref;
79 int n;
80 int pixstep;
81 int sample_count_mod;
82 int mode; ///< ShowWavesMode
83 int scale; ///< ShowWavesScale
84 int draw_mode; ///< ShowWavesDrawMode
85 int split_channels;
86 int filter_mode;
87 uint8_t *fg;
88
89 int (*get_h)(int16_t sample, int height);
90 void (*draw_sample)(uint8_t *buf, int height, int linesize,
91 int16_t *prev_y, const uint8_t color[4], int h);
92
93 /* single picture */
94 int single_pic;
95 struct frame_node *audio_frames;
96 struct frame_node *last_frame;
97 int64_t total_samples;
98 int64_t *sum; /* abs sum of the samples per channel */
99 } ShowWavesContext;
100
101 #define OFFSET(x) offsetof(ShowWavesContext, x)
102 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
103
104 static const AVOption showwaves_options[] = {
105 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
106 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
107 { "mode", "select display mode", OFFSET(mode), AV_OPT_TYPE_INT, {.i64=MODE_POINT}, 0, MODE_NB-1, FLAGS, "mode"},
108 { "point", "draw a point for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_POINT}, .flags=FLAGS, .unit="mode"},
109 { "line", "draw a line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_LINE}, .flags=FLAGS, .unit="mode"},
110 { "p2p", "draw a line between samples", 0, AV_OPT_TYPE_CONST, {.i64=MODE_P2P}, .flags=FLAGS, .unit="mode"},
111 { "cline", "draw a centered line for each sample", 0, AV_OPT_TYPE_CONST, {.i64=MODE_CENTERED_LINE}, .flags=FLAGS, .unit="mode"},
112 { "n", "set how many samples to show in the same point", OFFSET(n), AV_OPT_TYPE_INT, {.i64 = 0}, 0, INT_MAX, FLAGS },
113 { "rate", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, FLAGS },
114 { "r", "set video rate", OFFSET(rate), AV_OPT_TYPE_VIDEO_RATE, {.str = "25"}, 0, INT_MAX, FLAGS },
115 { "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
116 { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
117 { "scale", "set amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, SCALE_NB-1, FLAGS, .unit="scale" },
118 { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LIN}, .flags=FLAGS, .unit="scale"},
119 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LOG}, .flags=FLAGS, .unit="scale"},
120 { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_SQRT}, .flags=FLAGS, .unit="scale"},
121 { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_CBRT}, .flags=FLAGS, .unit="scale"},
122 { "draw", "set draw mode", OFFSET(draw_mode), AV_OPT_TYPE_INT, {.i64 = DRAW_SCALE}, 0, DRAW_NB-1, FLAGS, .unit="draw" },
123 { "scale", "scale pixel values for each drawn sample", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_SCALE}, .flags=FLAGS, .unit="draw"},
124 { "full", "draw every pixel for sample directly", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_FULL}, .flags=FLAGS, .unit="draw"},
125 { NULL }
126 };
127
128 AVFILTER_DEFINE_CLASS(showwaves);
129
uninit(AVFilterContext * ctx)130 static av_cold void uninit(AVFilterContext *ctx)
131 {
132 ShowWavesContext *showwaves = ctx->priv;
133
134 av_frame_free(&showwaves->outpicref);
135 av_freep(&showwaves->buf_idy);
136 av_freep(&showwaves->fg);
137
138 if (showwaves->single_pic) {
139 struct frame_node *node = showwaves->audio_frames;
140 while (node) {
141 struct frame_node *tmp = node;
142
143 node = node->next;
144 av_frame_free(&tmp->frame);
145 av_freep(&tmp);
146 }
147 av_freep(&showwaves->sum);
148 showwaves->last_frame = NULL;
149 }
150 }
151
query_formats(AVFilterContext * ctx)152 static int query_formats(AVFilterContext *ctx)
153 {
154 AVFilterFormats *formats = NULL;
155 AVFilterChannelLayouts *layouts = NULL;
156 AVFilterLink *inlink = ctx->inputs[0];
157 AVFilterLink *outlink = ctx->outputs[0];
158 static const enum AVSampleFormat sample_fmts[] = { AV_SAMPLE_FMT_S16, AV_SAMPLE_FMT_NONE };
159 static const enum AVPixelFormat pix_fmts[] = { AV_PIX_FMT_RGBA, AV_PIX_FMT_GRAY8, AV_PIX_FMT_NONE };
160 int ret;
161
162 /* set input audio formats */
163 formats = ff_make_format_list(sample_fmts);
164 if ((ret = ff_formats_ref(formats, &inlink->outcfg.formats)) < 0)
165 return ret;
166
167 layouts = ff_all_channel_layouts();
168 if ((ret = ff_channel_layouts_ref(layouts, &inlink->outcfg.channel_layouts)) < 0)
169 return ret;
170
171 formats = ff_all_samplerates();
172 if ((ret = ff_formats_ref(formats, &inlink->outcfg.samplerates)) < 0)
173 return ret;
174
175 /* set output video format */
176 formats = ff_make_format_list(pix_fmts);
177 if ((ret = ff_formats_ref(formats, &outlink->incfg.formats)) < 0)
178 return ret;
179
180 return 0;
181 }
182
get_lin_h(int16_t sample,int height)183 static int get_lin_h(int16_t sample, int height)
184 {
185 return height/2 - av_rescale(sample, height/2, INT16_MAX);
186 }
187
get_lin_h2(int16_t sample,int height)188 static int get_lin_h2(int16_t sample, int height)
189 {
190 return av_rescale(FFABS(sample), height, INT16_MAX);
191 }
192
get_log_h(int16_t sample,int height)193 static int get_log_h(int16_t sample, int height)
194 {
195 return height/2 - FFSIGN(sample) * (log10(1 + FFABS(sample)) * (height/2) / log10(1 + INT16_MAX));
196 }
197
get_log_h2(int16_t sample,int height)198 static int get_log_h2(int16_t sample, int height)
199 {
200 return log10(1 + FFABS(sample)) * height / log10(1 + INT16_MAX);
201 }
202
get_sqrt_h(int16_t sample,int height)203 static int get_sqrt_h(int16_t sample, int height)
204 {
205 return height/2 - FFSIGN(sample) * (sqrt(FFABS(sample)) * (height/2) / sqrt(INT16_MAX));
206 }
207
get_sqrt_h2(int16_t sample,int height)208 static int get_sqrt_h2(int16_t sample, int height)
209 {
210 return sqrt(FFABS(sample)) * height / sqrt(INT16_MAX);
211 }
212
get_cbrt_h(int16_t sample,int height)213 static int get_cbrt_h(int16_t sample, int height)
214 {
215 return height/2 - FFSIGN(sample) * (cbrt(FFABS(sample)) * (height/2) / cbrt(INT16_MAX));
216 }
217
get_cbrt_h2(int16_t sample,int height)218 static int get_cbrt_h2(int16_t sample, int height)
219 {
220 return cbrt(FFABS(sample)) * height / cbrt(INT16_MAX);
221 }
222
draw_sample_point_rgba_scale(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)223 static void draw_sample_point_rgba_scale(uint8_t *buf, int height, int linesize,
224 int16_t *prev_y,
225 const uint8_t color[4], int h)
226 {
227 if (h >= 0 && h < height) {
228 buf[h * linesize + 0] += color[0];
229 buf[h * linesize + 1] += color[1];
230 buf[h * linesize + 2] += color[2];
231 buf[h * linesize + 3] += color[3];
232 }
233 }
234
draw_sample_point_rgba_full(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)235 static void draw_sample_point_rgba_full(uint8_t *buf, int height, int linesize,
236 int16_t *prev_y,
237 const uint8_t color[4], int h)
238 {
239 if (h >= 0 && h < height) {
240 buf[h * linesize + 0] = color[0];
241 buf[h * linesize + 1] = color[1];
242 buf[h * linesize + 2] = color[2];
243 buf[h * linesize + 3] = color[3];
244 }
245 }
246
draw_sample_line_rgba_scale(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)247 static void draw_sample_line_rgba_scale(uint8_t *buf, int height, int linesize,
248 int16_t *prev_y,
249 const uint8_t color[4], int h)
250 {
251 int k;
252 int start = height/2;
253 int end = av_clip(h, 0, height-1);
254 if (start > end)
255 FFSWAP(int16_t, start, end);
256 for (k = start; k < end; k++) {
257 buf[k * linesize + 0] += color[0];
258 buf[k * linesize + 1] += color[1];
259 buf[k * linesize + 2] += color[2];
260 buf[k * linesize + 3] += color[3];
261 }
262 }
263
draw_sample_line_rgba_full(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)264 static void draw_sample_line_rgba_full(uint8_t *buf, int height, int linesize,
265 int16_t *prev_y,
266 const uint8_t color[4], int h)
267 {
268 int k;
269 int start = height/2;
270 int end = av_clip(h, 0, height-1);
271 if (start > end)
272 FFSWAP(int16_t, start, end);
273 for (k = start; k < end; k++) {
274 buf[k * linesize + 0] = color[0];
275 buf[k * linesize + 1] = color[1];
276 buf[k * linesize + 2] = color[2];
277 buf[k * linesize + 3] = color[3];
278 }
279 }
280
draw_sample_p2p_rgba_scale(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)281 static void draw_sample_p2p_rgba_scale(uint8_t *buf, int height, int linesize,
282 int16_t *prev_y,
283 const uint8_t color[4], int h)
284 {
285 int k;
286 if (h >= 0 && h < height) {
287 buf[h * linesize + 0] += color[0];
288 buf[h * linesize + 1] += color[1];
289 buf[h * linesize + 2] += color[2];
290 buf[h * linesize + 3] += color[3];
291 if (*prev_y && h != *prev_y) {
292 int start = *prev_y;
293 int end = av_clip(h, 0, height-1);
294 if (start > end)
295 FFSWAP(int16_t, start, end);
296 for (k = start + 1; k < end; k++) {
297 buf[k * linesize + 0] += color[0];
298 buf[k * linesize + 1] += color[1];
299 buf[k * linesize + 2] += color[2];
300 buf[k * linesize + 3] += color[3];
301 }
302 }
303 }
304 *prev_y = h;
305 }
306
draw_sample_p2p_rgba_full(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)307 static void draw_sample_p2p_rgba_full(uint8_t *buf, int height, int linesize,
308 int16_t *prev_y,
309 const uint8_t color[4], int h)
310 {
311 int k;
312 if (h >= 0 && h < height) {
313 buf[h * linesize + 0] = color[0];
314 buf[h * linesize + 1] = color[1];
315 buf[h * linesize + 2] = color[2];
316 buf[h * linesize + 3] = color[3];
317 if (*prev_y && h != *prev_y) {
318 int start = *prev_y;
319 int end = av_clip(h, 0, height-1);
320 if (start > end)
321 FFSWAP(int16_t, start, end);
322 for (k = start + 1; k < end; k++) {
323 buf[k * linesize + 0] = color[0];
324 buf[k * linesize + 1] = color[1];
325 buf[k * linesize + 2] = color[2];
326 buf[k * linesize + 3] = color[3];
327 }
328 }
329 }
330 *prev_y = h;
331 }
332
draw_sample_cline_rgba_scale(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)333 static void draw_sample_cline_rgba_scale(uint8_t *buf, int height, int linesize,
334 int16_t *prev_y,
335 const uint8_t color[4], int h)
336 {
337 int k;
338 const int start = (height - h) / 2;
339 const int end = start + h;
340 for (k = start; k < end; k++) {
341 buf[k * linesize + 0] += color[0];
342 buf[k * linesize + 1] += color[1];
343 buf[k * linesize + 2] += color[2];
344 buf[k * linesize + 3] += color[3];
345 }
346 }
draw_sample_cline_rgba_full(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)347 static void draw_sample_cline_rgba_full(uint8_t *buf, int height, int linesize,
348 int16_t *prev_y,
349 const uint8_t color[4], int h)
350 {
351 int k;
352 const int start = (height - h) / 2;
353 const int end = start + h;
354 for (k = start; k < end; k++) {
355 buf[k * linesize + 0] = color[0];
356 buf[k * linesize + 1] = color[1];
357 buf[k * linesize + 2] = color[2];
358 buf[k * linesize + 3] = color[3];
359 }
360 }
361
draw_sample_point_gray(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)362 static void draw_sample_point_gray(uint8_t *buf, int height, int linesize,
363 int16_t *prev_y,
364 const uint8_t color[4], int h)
365 {
366 if (h >= 0 && h < height)
367 buf[h * linesize] += color[0];
368 }
369
draw_sample_line_gray(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)370 static void draw_sample_line_gray(uint8_t *buf, int height, int linesize,
371 int16_t *prev_y,
372 const uint8_t color[4], int h)
373 {
374 int k;
375 int start = height/2;
376 int end = av_clip(h, 0, height-1);
377 if (start > end)
378 FFSWAP(int16_t, start, end);
379 for (k = start; k < end; k++)
380 buf[k * linesize] += color[0];
381 }
382
draw_sample_p2p_gray(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)383 static void draw_sample_p2p_gray(uint8_t *buf, int height, int linesize,
384 int16_t *prev_y,
385 const uint8_t color[4], int h)
386 {
387 int k;
388 if (h >= 0 && h < height) {
389 buf[h * linesize] += color[0];
390 if (*prev_y && h != *prev_y) {
391 int start = *prev_y;
392 int end = av_clip(h, 0, height-1);
393 if (start > end)
394 FFSWAP(int16_t, start, end);
395 for (k = start + 1; k < end; k++)
396 buf[k * linesize] += color[0];
397 }
398 }
399 *prev_y = h;
400 }
401
draw_sample_cline_gray(uint8_t * buf,int height,int linesize,int16_t * prev_y,const uint8_t color[4],int h)402 static void draw_sample_cline_gray(uint8_t *buf, int height, int linesize,
403 int16_t *prev_y,
404 const uint8_t color[4], int h)
405 {
406 int k;
407 const int start = (height - h) / 2;
408 const int end = start + h;
409 for (k = start; k < end; k++)
410 buf[k * linesize] += color[0];
411 }
412
config_output(AVFilterLink * outlink)413 static int config_output(AVFilterLink *outlink)
414 {
415 AVFilterContext *ctx = outlink->src;
416 AVFilterLink *inlink = ctx->inputs[0];
417 ShowWavesContext *showwaves = ctx->priv;
418 int nb_channels = inlink->channels;
419 char *colors, *saveptr = NULL;
420 uint8_t x;
421 int ch;
422
423 if (showwaves->single_pic)
424 showwaves->n = 1;
425
426 if (!showwaves->n)
427 showwaves->n = FFMAX(1, av_rescale_q(inlink->sample_rate, av_make_q(1, showwaves->w), showwaves->rate));
428
429 showwaves->buf_idx = 0;
430 if (!(showwaves->buf_idy = av_mallocz_array(nb_channels, sizeof(*showwaves->buf_idy)))) {
431 av_log(ctx, AV_LOG_ERROR, "Could not allocate showwaves buffer\n");
432 return AVERROR(ENOMEM);
433 }
434 outlink->w = showwaves->w;
435 outlink->h = showwaves->h;
436 outlink->sample_aspect_ratio = (AVRational){1,1};
437
438 outlink->frame_rate = av_div_q((AVRational){inlink->sample_rate,showwaves->n},
439 (AVRational){showwaves->w,1});
440
441 av_log(ctx, AV_LOG_VERBOSE, "s:%dx%d r:%f n:%d\n",
442 showwaves->w, showwaves->h, av_q2d(outlink->frame_rate), showwaves->n);
443
444 switch (outlink->format) {
445 case AV_PIX_FMT_GRAY8:
446 switch (showwaves->mode) {
447 case MODE_POINT: showwaves->draw_sample = draw_sample_point_gray; break;
448 case MODE_LINE: showwaves->draw_sample = draw_sample_line_gray; break;
449 case MODE_P2P: showwaves->draw_sample = draw_sample_p2p_gray; break;
450 case MODE_CENTERED_LINE: showwaves->draw_sample = draw_sample_cline_gray; break;
451 default:
452 return AVERROR_BUG;
453 }
454 showwaves->pixstep = 1;
455 break;
456 case AV_PIX_FMT_RGBA:
457 switch (showwaves->mode) {
458 case MODE_POINT: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_point_rgba_scale : draw_sample_point_rgba_full; break;
459 case MODE_LINE: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_line_rgba_scale : draw_sample_line_rgba_full; break;
460 case MODE_P2P: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_p2p_rgba_scale : draw_sample_p2p_rgba_full; break;
461 case MODE_CENTERED_LINE: showwaves->draw_sample = showwaves->draw_mode == DRAW_SCALE ? draw_sample_cline_rgba_scale : draw_sample_cline_rgba_full; break;
462 default:
463 return AVERROR_BUG;
464 }
465 showwaves->pixstep = 4;
466 break;
467 }
468
469 switch (showwaves->scale) {
470 case SCALE_LIN:
471 switch (showwaves->mode) {
472 case MODE_POINT:
473 case MODE_LINE:
474 case MODE_P2P: showwaves->get_h = get_lin_h; break;
475 case MODE_CENTERED_LINE: showwaves->get_h = get_lin_h2; break;
476 default:
477 return AVERROR_BUG;
478 }
479 break;
480 case SCALE_LOG:
481 switch (showwaves->mode) {
482 case MODE_POINT:
483 case MODE_LINE:
484 case MODE_P2P: showwaves->get_h = get_log_h; break;
485 case MODE_CENTERED_LINE: showwaves->get_h = get_log_h2; break;
486 default:
487 return AVERROR_BUG;
488 }
489 break;
490 case SCALE_SQRT:
491 switch (showwaves->mode) {
492 case MODE_POINT:
493 case MODE_LINE:
494 case MODE_P2P: showwaves->get_h = get_sqrt_h; break;
495 case MODE_CENTERED_LINE: showwaves->get_h = get_sqrt_h2; break;
496 default:
497 return AVERROR_BUG;
498 }
499 break;
500 case SCALE_CBRT:
501 switch (showwaves->mode) {
502 case MODE_POINT:
503 case MODE_LINE:
504 case MODE_P2P: showwaves->get_h = get_cbrt_h; break;
505 case MODE_CENTERED_LINE: showwaves->get_h = get_cbrt_h2; break;
506 default:
507 return AVERROR_BUG;
508 }
509 break;
510 }
511
512 showwaves->fg = av_malloc_array(nb_channels, 4 * sizeof(*showwaves->fg));
513 if (!showwaves->fg)
514 return AVERROR(ENOMEM);
515
516 colors = av_strdup(showwaves->colors);
517 if (!colors)
518 return AVERROR(ENOMEM);
519
520 if (showwaves->draw_mode == DRAW_SCALE) {
521 /* multiplication factor, pre-computed to avoid in-loop divisions */
522 x = 255 / ((showwaves->split_channels ? 1 : nb_channels) * showwaves->n);
523 } else {
524 x = 255;
525 }
526 if (outlink->format == AV_PIX_FMT_RGBA) {
527 uint8_t fg[4] = { 0xff, 0xff, 0xff, 0xff };
528
529 for (ch = 0; ch < nb_channels; ch++) {
530 char *color;
531
532 color = av_strtok(ch == 0 ? colors : NULL, " |", &saveptr);
533 if (color)
534 av_parse_color(fg, color, -1, ctx);
535 showwaves->fg[4*ch + 0] = fg[0] * x / 255.;
536 showwaves->fg[4*ch + 1] = fg[1] * x / 255.;
537 showwaves->fg[4*ch + 2] = fg[2] * x / 255.;
538 showwaves->fg[4*ch + 3] = fg[3] * x / 255.;
539 }
540 } else {
541 for (ch = 0; ch < nb_channels; ch++)
542 showwaves->fg[4 * ch + 0] = x;
543 }
544 av_free(colors);
545
546 return 0;
547 }
548
push_frame(AVFilterLink * outlink)549 inline static int push_frame(AVFilterLink *outlink)
550 {
551 AVFilterContext *ctx = outlink->src;
552 AVFilterLink *inlink = ctx->inputs[0];
553 ShowWavesContext *showwaves = outlink->src->priv;
554 int nb_channels = inlink->channels;
555 int ret, i;
556
557 ret = ff_filter_frame(outlink, showwaves->outpicref);
558 showwaves->outpicref = NULL;
559 showwaves->buf_idx = 0;
560 for (i = 0; i < nb_channels; i++)
561 showwaves->buf_idy[i] = 0;
562 return ret;
563 }
564
push_single_pic(AVFilterLink * outlink)565 static int push_single_pic(AVFilterLink *outlink)
566 {
567 AVFilterContext *ctx = outlink->src;
568 AVFilterLink *inlink = ctx->inputs[0];
569 ShowWavesContext *showwaves = ctx->priv;
570 int64_t n = 0, column_max_samples = showwaves->total_samples / outlink->w;
571 int64_t remaining_samples = showwaves->total_samples - (column_max_samples * outlink->w);
572 int64_t last_column_samples = column_max_samples + remaining_samples;
573 AVFrame *out = showwaves->outpicref;
574 struct frame_node *node;
575 const int nb_channels = inlink->channels;
576 const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
577 const int linesize = out->linesize[0];
578 const int pixstep = showwaves->pixstep;
579 int col = 0;
580 int64_t *sum = showwaves->sum;
581
582 if (column_max_samples == 0) {
583 av_log(ctx, AV_LOG_ERROR, "Too few samples\n");
584 return AVERROR(EINVAL);
585 }
586
587 av_log(ctx, AV_LOG_DEBUG, "Create frame averaging %"PRId64" samples per column\n", column_max_samples);
588
589 memset(sum, 0, nb_channels);
590
591 for (node = showwaves->audio_frames; node; node = node->next) {
592 int i;
593 const AVFrame *frame = node->frame;
594 const int16_t *p = (const int16_t *)frame->data[0];
595
596 for (i = 0; i < frame->nb_samples; i++) {
597 int64_t max_samples = col == outlink->w - 1 ? last_column_samples: column_max_samples;
598 int ch;
599
600 switch (showwaves->filter_mode) {
601 case FILTER_AVERAGE:
602 for (ch = 0; ch < nb_channels; ch++)
603 sum[ch] += abs(p[ch + i*nb_channels]) << 1;
604 break;
605 case FILTER_PEAK:
606 for (ch = 0; ch < nb_channels; ch++)
607 sum[ch] = FFMAX(sum[ch], abs(p[ch + i*nb_channels]));
608 break;
609 }
610
611 n++;
612 if (n == max_samples) {
613 for (ch = 0; ch < nb_channels; ch++) {
614 int16_t sample = sum[ch] / (showwaves->filter_mode == FILTER_AVERAGE ? max_samples : 1);
615 uint8_t *buf = out->data[0] + col * pixstep;
616 int h;
617
618 if (showwaves->split_channels)
619 buf += ch*ch_height*linesize;
620 av_assert0(col < outlink->w);
621 h = showwaves->get_h(sample, ch_height);
622 showwaves->draw_sample(buf, ch_height, linesize, &showwaves->buf_idy[ch], &showwaves->fg[ch * 4], h);
623 sum[ch] = 0;
624 }
625 col++;
626 n = 0;
627 }
628 }
629 }
630
631 return push_frame(outlink);
632 }
633
634
request_frame(AVFilterLink * outlink)635 static int request_frame(AVFilterLink *outlink)
636 {
637 ShowWavesContext *showwaves = outlink->src->priv;
638 AVFilterLink *inlink = outlink->src->inputs[0];
639 int ret;
640
641 ret = ff_request_frame(inlink);
642 if (ret == AVERROR_EOF && showwaves->outpicref) {
643 if (showwaves->single_pic)
644 push_single_pic(outlink);
645 else
646 push_frame(outlink);
647 }
648
649 return ret;
650 }
651
alloc_out_frame(ShowWavesContext * showwaves,const int16_t * p,const AVFilterLink * inlink,AVFilterLink * outlink,const AVFrame * in)652 static int alloc_out_frame(ShowWavesContext *showwaves, const int16_t *p,
653 const AVFilterLink *inlink, AVFilterLink *outlink,
654 const AVFrame *in)
655 {
656 if (!showwaves->outpicref) {
657 int j;
658 AVFrame *out = showwaves->outpicref =
659 ff_get_video_buffer(outlink, outlink->w, outlink->h);
660 if (!out)
661 return AVERROR(ENOMEM);
662 out->width = outlink->w;
663 out->height = outlink->h;
664 out->pts = in->pts + av_rescale_q((p - (int16_t *)in->data[0]) / inlink->channels,
665 av_make_q(1, inlink->sample_rate),
666 outlink->time_base);
667 for (j = 0; j < outlink->h; j++)
668 memset(out->data[0] + j*out->linesize[0], 0, outlink->w * showwaves->pixstep);
669 }
670 return 0;
671 }
672
init(AVFilterContext * ctx)673 static av_cold int init(AVFilterContext *ctx)
674 {
675 ShowWavesContext *showwaves = ctx->priv;
676
677 if (!strcmp(ctx->filter->name, "showwavespic")) {
678 showwaves->single_pic = 1;
679 showwaves->mode = MODE_CENTERED_LINE;
680 }
681
682 return 0;
683 }
684
685 #if CONFIG_SHOWWAVES_FILTER
686
showwaves_filter_frame(AVFilterLink * inlink,AVFrame * insamples)687 static int showwaves_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
688 {
689 AVFilterContext *ctx = inlink->dst;
690 AVFilterLink *outlink = ctx->outputs[0];
691 ShowWavesContext *showwaves = ctx->priv;
692 const int nb_samples = insamples->nb_samples;
693 AVFrame *outpicref = showwaves->outpicref;
694 int16_t *p = (int16_t *)insamples->data[0];
695 int nb_channels = inlink->channels;
696 int i, j, ret = 0;
697 const int pixstep = showwaves->pixstep;
698 const int n = showwaves->n;
699 const int ch_height = showwaves->split_channels ? outlink->h / nb_channels : outlink->h;
700
701 /* draw data in the buffer */
702 for (i = 0; i < nb_samples; i++) {
703
704 ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
705 if (ret < 0)
706 goto end;
707 outpicref = showwaves->outpicref;
708
709 for (j = 0; j < nb_channels; j++) {
710 uint8_t *buf = outpicref->data[0] + showwaves->buf_idx * pixstep;
711 const int linesize = outpicref->linesize[0];
712 int h;
713
714 if (showwaves->split_channels)
715 buf += j*ch_height*linesize;
716 h = showwaves->get_h(*p++, ch_height);
717 showwaves->draw_sample(buf, ch_height, linesize,
718 &showwaves->buf_idy[j], &showwaves->fg[j * 4], h);
719 }
720
721 showwaves->sample_count_mod++;
722 if (showwaves->sample_count_mod == n) {
723 showwaves->sample_count_mod = 0;
724 showwaves->buf_idx++;
725 }
726 if (showwaves->buf_idx == showwaves->w ||
727 (ff_outlink_get_status(inlink) && i == nb_samples - 1))
728 if ((ret = push_frame(outlink)) < 0)
729 break;
730 outpicref = showwaves->outpicref;
731 }
732
733 end:
734 av_frame_free(&insamples);
735 return ret;
736 }
737
activate(AVFilterContext * ctx)738 static int activate(AVFilterContext *ctx)
739 {
740 AVFilterLink *inlink = ctx->inputs[0];
741 AVFilterLink *outlink = ctx->outputs[0];
742 ShowWavesContext *showwaves = ctx->priv;
743 AVFrame *in;
744 const int nb_samples = showwaves->n * outlink->w;
745 int ret;
746
747 FF_FILTER_FORWARD_STATUS_BACK(outlink, inlink);
748
749 ret = ff_inlink_consume_samples(inlink, nb_samples, nb_samples, &in);
750 if (ret < 0)
751 return ret;
752 if (ret > 0)
753 return showwaves_filter_frame(inlink, in);
754
755 FF_FILTER_FORWARD_STATUS(inlink, outlink);
756 FF_FILTER_FORWARD_WANTED(outlink, inlink);
757
758 return FFERROR_NOT_READY;
759 }
760
761 static const AVFilterPad showwaves_inputs[] = {
762 {
763 .name = "default",
764 .type = AVMEDIA_TYPE_AUDIO,
765 },
766 { NULL }
767 };
768
769 static const AVFilterPad showwaves_outputs[] = {
770 {
771 .name = "default",
772 .type = AVMEDIA_TYPE_VIDEO,
773 .config_props = config_output,
774 },
775 { NULL }
776 };
777
778 AVFilter ff_avf_showwaves = {
779 .name = "showwaves",
780 .description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output."),
781 .init = init,
782 .uninit = uninit,
783 .query_formats = query_formats,
784 .priv_size = sizeof(ShowWavesContext),
785 .inputs = showwaves_inputs,
786 .activate = activate,
787 .outputs = showwaves_outputs,
788 .priv_class = &showwaves_class,
789 };
790
791 #endif // CONFIG_SHOWWAVES_FILTER
792
793 #if CONFIG_SHOWWAVESPIC_FILTER
794
795 #define OFFSET(x) offsetof(ShowWavesContext, x)
796 #define FLAGS AV_OPT_FLAG_FILTERING_PARAM|AV_OPT_FLAG_VIDEO_PARAM
797
798 static const AVOption showwavespic_options[] = {
799 { "size", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
800 { "s", "set video size", OFFSET(w), AV_OPT_TYPE_IMAGE_SIZE, {.str = "600x240"}, 0, 0, FLAGS },
801 { "split_channels", "draw channels separately", OFFSET(split_channels), AV_OPT_TYPE_BOOL, {.i64 = 0}, 0, 1, FLAGS },
802 { "colors", "set channels colors", OFFSET(colors), AV_OPT_TYPE_STRING, {.str = "red|green|blue|yellow|orange|lime|pink|magenta|brown" }, 0, 0, FLAGS },
803 { "scale", "set amplitude scale", OFFSET(scale), AV_OPT_TYPE_INT, {.i64 = 0 }, 0, SCALE_NB-1, FLAGS, .unit="scale" },
804 { "lin", "linear", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LIN}, .flags=FLAGS, .unit="scale"},
805 { "log", "logarithmic", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_LOG}, .flags=FLAGS, .unit="scale"},
806 { "sqrt", "square root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_SQRT}, .flags=FLAGS, .unit="scale"},
807 { "cbrt", "cubic root", 0, AV_OPT_TYPE_CONST, {.i64=SCALE_CBRT}, .flags=FLAGS, .unit="scale"},
808 { "draw", "set draw mode", OFFSET(draw_mode), AV_OPT_TYPE_INT, {.i64 = DRAW_SCALE}, 0, DRAW_NB-1, FLAGS, .unit="draw" },
809 { "scale", "scale pixel values for each drawn sample", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_SCALE}, .flags=FLAGS, .unit="draw"},
810 { "full", "draw every pixel for sample directly", 0, AV_OPT_TYPE_CONST, {.i64=DRAW_FULL}, .flags=FLAGS, .unit="draw"},
811 { "filter", "set filter mode", OFFSET(filter_mode), AV_OPT_TYPE_INT, {.i64 = FILTER_AVERAGE}, 0, FILTER_NB-1, FLAGS, .unit="filter" },
812 { "average", "use average samples", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_AVERAGE}, .flags=FLAGS, .unit="filter"},
813 { "peak", "use peak samples", 0, AV_OPT_TYPE_CONST, {.i64=FILTER_PEAK}, .flags=FLAGS, .unit="filter"},
814 { NULL }
815 };
816
817 AVFILTER_DEFINE_CLASS(showwavespic);
818
showwavespic_config_input(AVFilterLink * inlink)819 static int showwavespic_config_input(AVFilterLink *inlink)
820 {
821 AVFilterContext *ctx = inlink->dst;
822 ShowWavesContext *showwaves = ctx->priv;
823
824 if (showwaves->single_pic) {
825 showwaves->sum = av_mallocz_array(inlink->channels, sizeof(*showwaves->sum));
826 if (!showwaves->sum)
827 return AVERROR(ENOMEM);
828 }
829
830 return 0;
831 }
832
showwavespic_filter_frame(AVFilterLink * inlink,AVFrame * insamples)833 static int showwavespic_filter_frame(AVFilterLink *inlink, AVFrame *insamples)
834 {
835 AVFilterContext *ctx = inlink->dst;
836 AVFilterLink *outlink = ctx->outputs[0];
837 ShowWavesContext *showwaves = ctx->priv;
838 int16_t *p = (int16_t *)insamples->data[0];
839 int ret = 0;
840
841 if (showwaves->single_pic) {
842 struct frame_node *f;
843
844 ret = alloc_out_frame(showwaves, p, inlink, outlink, insamples);
845 if (ret < 0)
846 goto end;
847
848 /* queue the audio frame */
849 f = av_malloc(sizeof(*f));
850 if (!f) {
851 ret = AVERROR(ENOMEM);
852 goto end;
853 }
854 f->frame = insamples;
855 f->next = NULL;
856 if (!showwaves->last_frame) {
857 showwaves->audio_frames =
858 showwaves->last_frame = f;
859 } else {
860 showwaves->last_frame->next = f;
861 showwaves->last_frame = f;
862 }
863 showwaves->total_samples += insamples->nb_samples;
864
865 return 0;
866 }
867
868 end:
869 av_frame_free(&insamples);
870 return ret;
871 }
872
873 static const AVFilterPad showwavespic_inputs[] = {
874 {
875 .name = "default",
876 .type = AVMEDIA_TYPE_AUDIO,
877 .config_props = showwavespic_config_input,
878 .filter_frame = showwavespic_filter_frame,
879 },
880 { NULL }
881 };
882
883 static const AVFilterPad showwavespic_outputs[] = {
884 {
885 .name = "default",
886 .type = AVMEDIA_TYPE_VIDEO,
887 .config_props = config_output,
888 .request_frame = request_frame,
889 },
890 { NULL }
891 };
892
893 AVFilter ff_avf_showwavespic = {
894 .name = "showwavespic",
895 .description = NULL_IF_CONFIG_SMALL("Convert input audio to a video output single picture."),
896 .init = init,
897 .uninit = uninit,
898 .query_formats = query_formats,
899 .priv_size = sizeof(ShowWavesContext),
900 .inputs = showwavespic_inputs,
901 .outputs = showwavespic_outputs,
902 .priv_class = &showwavespic_class,
903 };
904
905 #endif // CONFIG_SHOWWAVESPIC_FILTER
906